#Debugging

In this article I'll cover testing and debugging Caché web applications (mainly REST) with external tools. Second part covers Caché tools.

You wrote server-side code and want to test it from a client or already have a web application and it doesn't work. Here comes debugging. In this article I'll go from the easiest to use tools (browser) to the most comprehensive (packet analyzer), but first let's talk a little about most common errors and how they can be resolved.

When there's a performance issue, whether for all users on the system or a single process, the shortest path to understanding the root cause is usually to understand what the processes in question are spending their time doing. Are they mostly using CPU to dutifully march through their algorithm (for better or worse); or are they mostly reading database blocks from disk; or mostly waiting for something else, like LOCKs, ECP or database block collisions?

The %Net.SSH.Session class lets you connect to servers using SSH. It's most commonly used with SFTP, especially in the FTP inbound and outbound adaptors.

In this article, I'm going to give a quick example of how to connect to an SSH server using the class, describe your options for authenticating, and how to debug when things go wrong.

Here's an example of making the connection:

If you are attending Global Summit 2018 please be sure to say hello to George James Software in the Partner Pavilion.

You are also invited to the informal lunchtime meeting we're hosting at Global Summit on Tuesday 2nd October from 1pm in Indian Paintbrush, a meeting room at the conference venue. We will be previewing the next versions of Deltanji, our integrated source code management solution, and Serenji, our editor and debugger.

Introduction

In the next few weeks, my coworkers are planning to start using VSCode to code with InterSystems' products. Among the many advantages of that, I would emphasize being able to connect with other technologies, such as GitHub, with ease. Besides, VSCode also offers an extensive extensions store, where you can find many free add-ons that make coding faster and more efficient. Last but not least, to conquer the heart of every developer, it is open source.

In the WRC, we frequently see customers contact us because their Web Gateway is unable to serve web pages. This article will explain a frequent reason why these errors can occur, and explain some tools which can be used to debug the problem. This explanation is focused on the Web Gateway serving InterSystems IRIS instances, but the same explanation should apply to the CSP Gateway serving Caché instances as well.

With the world (as well as our own technology) moving to the cloud at such a fast pace it is easy (at least for myself) to get caught up in the little details. One thing I, and some clients of ours, had run into a couple of times was the necessity to specify the version of the images one plans to use with the IKO.

Intro

If you ever wondered how to debug some requests that are being made to or from IRIS, well here is a little tutorial on how to do that.

During a complex project, usually you get the specifications and implement the communication between IRIS and other things based on that. But from the paper to the real world there's usually a huge gap and you need to know why you are receiving an error on a parameter, on a header, you are not receiving the data and so on.

Hi developers,

We're excited to let you know about the latest release of Serenji, your on-the-spot debugger from George James Software. Version 3.2.0 focuses on the debug experience and introduces zero configuration for users. No matter where you are or what you're doing, Serenji is always ready to go in just one click, so you won't lose focus by spending time setting up a launch configuration.

This enhanced debugger also takes advantage of the latest features of VS Code itself. With this powerful combination you'll be able to smoothly identify and quickly fix errors in your code, contributing to the production of quality, maintainable code... and isn't that what everyone wants?!

In this latest release you will experience:

• Debugging in just one click with zero configuration.
• Navigation directly to the source of an error using our gj :: locate technology.
• Intuitive prompting for entrypoint and arguments.
• Configurable break on error.
• Program output in debug console.
• Run and Debug CodeLenses.
• Run multiple concurrent debug sessions and consoles.
• Shaded background for read-only documents.

If you're a new user, it's now easier for you to get started. The introduction of a welcome page Walkthrough and guidance on the Explorer and Run and Debug views means you can effortlessly create your initial workspace and start debugging.

Download Serenji directly from the VS Code marketplace and take a look at our release notes to find out more about these new features and how to use them.

We offer a free 30 day trial so if you're not yet a user of Serenji but you're interested in how it can help you, drop me a message through the Developer Community or email us at info@georgejames.com.

Happy debugging!

Following 2 local Webinars we had focused on VS Code ["Intro" and "Beyond Basics"; in Hebrew], I prepared for the participants some related links of relevant resources which we sent as a follow-up. Sharing them here as well for the benefit of the Community.
You are all of course welcome to add more useful resources.

Hi community!

In this article, I'm excited to introduce my latest application, Journal File Indexer. The development of this application is rooted in the portal idea DPI-I-270.

In short, this application lets you load and index a log file in a database.

Why?

If you've ever used the log file search function in the management portal, you may have encountered a timeout error or even a blank page. This problem usually occurs when searching a large journal file. Journal File Indexer solves this problem by considerably increasing the speed of searches once the file has been loaded into the database.

Another problem arises during the restoration process. When searching for global entries in a log file to restore old or new values, the management portal doesn't have this specific functionality. A routine must therefore be coded to achieve this. Journal File Indexer comes to the rescue, incorporating a restore function!

Hey everyone,

I'm diving deeper into Caché ObjectScript and would love to open a discussion around the most useful tips, tricks, and best practices you’ve learned or discovered while working with it.

Whether you're an experienced developer or just getting started, ObjectScript has its own set of quirks and powerful features—some well-documented, others hidden gems. I’m looking to compile a helpful set of ideas from the community.

Some areas I’m especially interested in:

DeepSeeButtons is available on Open Exchange! This tool will generate a diagnostic report of your DeepSee environment.

Hi Community!

Please welcome a new video on InterSystems Developers YouTube:

Atelier – Debugging a Class

https://www.youtube.com/embed/xr1Ncz_ZH_Q
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